Spermicide is a type of contraceptive substance that contains chemicals designed to immobilize or kill sperm and prevent them from fertilizing an egg. Spermicides come in various forms, including creams, gels, foams, suppositories, and films, and are applied inside the vagina before sexual intercourse. They work by creating a barrier that blocks sperm from reaching and fertilizing an egg.

Spermicides are often used in combination with other forms of contraception, such as condoms, diaphragms, or cervical caps, to increase their effectiveness in preventing pregnancy. However, spermicides are generally considered less reliable on their own and are recommended to be used in conjunction with another form of birth control for optimal protection.

It is important to follow the instructions for using spermicides carefully and to reapply them as directed before each instance of sexual activity. Some individuals may have sensitivities or allergic reactions to certain chemicals in spermicides, so it is advisable to test a small amount on the skin before internal use. Proper and consistent use of spermicides, along with regular communication with sexual partners about contraceptive methods, can help individuals make informed choices about their reproductive health and prevent unintended pregnancies.